Fig. 1
Axial femoral intercondylar notch area measurement in the posterior view of a right femoral condyle. Axial femoral intercondylar notch areas were measured at the most proximal and most distal height of Blumensaat’s line. When calculating the volume of the truncated pyramid shape, the proximal (*) and distal area (**) were regarded as the upper and lower base (S1 and S2) and the height (h) of the truncated pyramidal shape was the height of the intercondylar notch